CN106322362B - A kind of combustion method of biomass combustion machine and biomass fuel - Google Patents
A kind of combustion method of biomass combustion machine and biomass fuel Download PDFInfo
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- CN106322362B CN106322362B CN201610790856.2A CN201610790856A CN106322362B CN 106322362 B CN106322362 B CN 106322362B CN 201610790856 A CN201610790856 A CN 201610790856A CN 106322362 B CN106322362 B CN 106322362B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
- F23B60/02—Combustion apparatus in which the fuel burns essentially without moving with combustion air supplied through a grate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B90/00—Combustion methods not related to a particular type of apparatus
- F23B90/04—Combustion methods not related to a particular type of apparatus including secondary combustion
- F23B90/06—Combustion methods not related to a particular type of apparatus including secondary combustion the primary combustion being a gasification or pyrolysis in a reductive atmosphere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
A kind of combustion method of biomass fuel the invention discloses biomass combustion machine and using the combustor, the combustor include：Combustion furnace；Steam copper type bell, the steam copper type bell are placed on the combustion furnace, and it is interior be filled with water, generate water vapour in the biomass fuel combustion；Gas mixing conveying assembly, to by steam copper type bell water vapour and outside air mix after be delivered in the combustion furnace；Temperature sensor is located at the biomass fuel rest area on the grate；Control device, the temperature for being acquired according to the temperature sensor control the gas mixing conveying assembly to the mixed proportion of water vapour and outside air and conveying wind-force.The present invention can effectively control the problem of combustion furnace burning, prevent the coking of biomass fuel.
Description
Technical field
The present invention relates to field of combustion technology, more particularly to a kind of biomass combustion machine and use the biomass combustion machine
Biomass fuel combustion method.
Background technology
In world's energy consumption, biomass energy accounts for about 14%, and 60% or more is accounted in under-developed area.There are about 2,500,000,000 in the whole world
90% or more of the domestic energy of people is biomass energy.
The advantages of biomass energy is to be readily burned, pollute that small, ash content is relatively low, and disadvantage is mainly that calorific value and the thermal efficiency are low,
And volume is big and is not easy to transport.The thermal efficiency of direct biomass burning is only 10%~30%.
Currently, countries in the world just utilize biomass energy with the following method：
1, thermochemical conversion method.
The high energy products of grades such as charcoal, tar and fuel gas are mainly obtained by this method.This method is by its heat
The method of processing is different, is divided into high-temperature retorting, pyrolysis, biomass liquefying etc..
2, biochemical transformations method.
This method is primarily referred to as biomass under the fermentation of microorganism, forms methane, the energy products such as alcohol.
3, using bio oil caused by oilseed plant as fuel.
4, biomass compression molding fuel (such as block type, rod-type fuel element), with focus utilization and the thermal efficiency is improved.
Biomass energy is always important energy source for the survival of mankind, it be only second to coal, oil and natural gas and occupy
In the 4th energy of world energy sources total quantity consumed, occupied an important position in entire energy resource system.Relevant expert estimates, biological
Mass-energy very likely becomes the component part of the following sustainable energy system, arrives mid-21st Century, production of employing new technology it is each
Kind biomass substitute fuel will account for 40% or more of global total energy consumption.
Fig. 1 shows a kind of structure of existing biomass combustion furnace.In the combustion furnace, in 91 basis rest grate of burner hearth
92；Biomass fuel enters burner hearth 91 from feed pipe 93, is placed on grate 92；It opens the lower part that the burner hearth 91 is located at grate 92
If air inlet 94, air is blown into burner hearth 91 to be opposite to the combustion on grate 92 by wind turbine (not shown) from air inlet 94
The biomass fuel of burning is combustion-supporting；The top of burner hearth 91 is covered by head cover 95 closes, 91 top of burner hearth sidewall opening and burner is installed
96, the flame in burner hearth is sprayed from burner 96, can further install wind turbine (not shown) to burner 96 blow with
It is further combustion-supporting at burner 96.
Although biomass fuel has very important effect in energy resource system, its combustion thermal efficiency is low, and
The problems such as in the presence of pollution, and there is also many deficiencies for the combustor and combustion process method of existing biomass fuel, such as：
1, fuel tolerance is poor：Only adapt to that ash content is low, and the Wooden Biomass fuel that ash fusion point is high；
2, make fire grate be easy to coking the characteristics of biomass fuel, be easily deformed or even burn.
3, biomass fuel makes burner hearth be easy to coking, is easy to burn.
5, due to the presence of coking problem so that burner hearth air intake passage is seriously obstructed and runner is unevenly distributed, serious shadow
Ring combustion efficiency.
6, burner hearth head cover is easy to burst apart, cave in.
Therefore, it for combustion system, needs to be improved and be promoted.
Invention content
In view of this, the present invention provides a kind of biomass combustion machine and the biomass fuel using the biomass combustion machine
Combustion method, coking when preventing biomass fuel from burning in combustion furnace occurs.
The technical proposal of the invention is realized in this way：
A kind of biomass combustion machine, including：
Combustion furnace is equipped with grate in the combustion furnace, and biomass fuel, which is positioned on the grate, to burn；
Steam copper type bell, the steam copper type bell are placed on the combustion furnace, and it is interior be filled with water, in the biomass fuel
Water vapour is generated when material burning；
Gas mixing conveying assembly, the gas mixing conveying assembly include the first wind turbine, the gas mixing conveying group
Part is connected to the lower part of grate in the steam copper type bell, outside air and combustion furnace, and the water in steam copper type bell is steamed
It is delivered in the combustion furnace after vapour and outside air mixing；
Temperature sensor, the temperature sensor are located at the biomass fuel rest area on the grate；
Control device, the control device are electrically connected to the temperature sensor and first wind turbine, with according to
The temperature that temperature sensor is acquired controls the wind-force and the control gas mixing conveying assembly of the first wind turbine conveying
To the mixed proportion of water vapour and outside air.
Further, the gas mixing conveying assembly includes vapor communication pipe, gas mixing tube, combustion furnace communicating pipe, steams
Steam control valve, air control valve and the first wind turbine；Wherein,
First wind turbine outlet side is connected to the bottom of grate in the combustion furnace by the combustion furnace communicating pipe；
The gas mixing tube is communicated between the inlet end and air control valve of first wind turbine, and passes through the sky
Gas regulating valve is communicated in outside air；
One end of the vapor communication pipe is communicated in the steam copper type bell, and the other end of the vapor communication pipe passes through
The steam control valve is communicated in the gas mixing tube close to one end of the air control valve.
Further, the biomass combustion machine further includes feed bin, wind stopping device, the second wind turbine and feed pipe；Wherein,
The feed bin is for storing biomass fuel temporarily；
The wind stopping device is located at the bottom of the feed bin, and is connected to biomass in the combustion furnace by the feed pipe
The top of fuel rest area；
The outlet side of second wind turbine is connected to the feed pipe close to one end of the wind stopping device, second wind turbine
Inlet end be communicated in outside air.
Further, the biomass combustion machine further includes：
Whirlwind grid, the whirlwind grid are located at the lower part of grate in the combustion furnace, the gas mixing conveying assembly
It is connected to the whirlwind grid.
Further, the biomass combustion machine further includes：
Burner, the burner are installed on the side wall of the combustion furnace, and close to the steam copper type bell, the combustion
Stove is burnt in the side-walls opening for installing the burner so that the flame in the combustion furnace enters the combustion by the opening
Burner is simultaneously sprayed from the burner.
Further, the biomass combustion machine further includes third wind turbine and burner communicating pipe；Wherein,
The outlet side of the third wind turbine is by being communicated in the burner, the third wind turbine burner communicating pipe
Inlet end be connected to outside air.
Further, the furnace wall of combustion furnace is refractory insulating layer.
Further, the furnace wall of the combustion furnace is equipped with fire door.
The present invention also provides a kind of combustion method of biomass fuel, the method includes：
Biomass fuel is placed on the grate in the combustion furnace；
It injects water into the steam copper type bell；
The biomass fuel is lighted, and monitors the temperature of the biomass fuel rest area；
When the temperature of the biomass fuel rest area be higher than predetermined threshold value when, by steam copper type bell water vapour and
It is delivered in the combustion furnace after outside air mixing, so that the temperature of the biomass fuel rest area is less than the default threshold
Value.
Further, the predetermined threshold value is 900 DEG C.
The advantages of combustion method of biomass combustion machine and biomass fuel of the invention, is：
Provide novel steam copper type bell, the steam copper type bell due to water continuous supply and evaporation, even if warm
It spends highest bottom and also obtains dynamic equilibrium at 100 DEG C or so, the high temperature that lower part flame can be also stood with common carbon steel is made
With compared with traditional fire resisting bell, making simple, using reliable, will not burst apart, collapse, also, the steam generated is just
Temperature for the first combustion zone is adjusted；The measurement and control of temperature of first combustion zone and adjusting, it is ensured that when biomass fuel combustion
The temperature of one combustion zone is less than the ash fusion point of fuel, therefore, will not cause the softening and melting of burning ashes, so, Bu Huijie
It is burnt；Due to will not coking, so the air feed of the first combustion zone remains unimpeded, combustor burning can very steady, effect
It is very good, and remove ashes also and become very easy；Due to the introducing of vapor and the implementation of temperature control measure so that grate
Failure rate reduces, and the service life greatly improves, also, the service life of furnace wall refractory insulating layer can also greatly improve；It is opened by control device
Move the acquisition to temperature sensor signal and to the first wind turbine, the second wind turbine, third wind turbine, wind stopping device, air control valve, steam
Regulating valve is controlled to adjust accordingly, can reach ideal combustion efficiency；Due to solving coking problem so that the present invention
Embodiment is suitable for all biomass fuels, solves traditional combustion machine and only adapts to that ash content is low, and high wooden of ash fusion point
The problem of biomass fuel.The present invention, which has herbaceous biomass fuel, well adapts to ability, is biomass clean fuel
Application opens wide space.The embodiment of the present invention, burning subregion is reasonable, combustion process clean environment firendly, equipment installation
Debugging is simple, and process is simple and reliable, and manufacturing cost is low.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of existing biomass combustion furnace；
Fig. 2 is the example structure schematic diagram of the biomass combustion machine of the present invention；
Fig. 3 is the combustion method embodiment flow chart of the biomass fuel of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, develop simultaneously embodiment referring to the drawings,
Invention is further described in detail.
As shown in Fig. 2, the biomass combustion machine embodiment of the present invention includes that combustion furnace 1, steam copper type bell 2, gas are mixed
Close conveying assembly 3, temperature sensor 4 and control device (not shown).Wherein, grate 11 is housed in the combustion furnace, it is raw
Biomass fuel, which is positioned on the grate 11, to burn.The steam copper type bell 2 is placed on the combustion furnace 1, and it is interior be filled with water,
Water vapour is generated when the biomass fuel combustion.The gas mixing conveying assembly 3 is connected to the steam copper type bell 2, outer
The lower part of grate 11 in boundary's air and combustion furnace 1, by steam copper type bell 2 water vapour and outside air mix after convey
To in the combustion furnace 1.The temperature sensor 4 is located at the biomass fuel rest area on the grate.The control device
(not shown) is electrically connected to the temperature sensor 4 and gas blending transportation component 3, with according to the temperature sensor 4
The temperature acquired controls the gas mixing conveying assembly 3 to the mixed proportion of water vapour and outside air and conveying wind
Power.
Specifically, the gas mixing conveying assembly 3 includes vapor communication pipe 31, gas mixing tube 32, combustion furnace connection
Pipe 33, steam control valve 34, air control valve 35 and the first wind turbine 36.Wherein, the outlet side of first wind turbine 36 passes through institute
State the lower part for combustion furnace communicating pipe 33 being connected to grate 11 in the combustion furnace 1.The gas mixing tube 32 is communicated in described
Between the inlet end and air control valve 35 of one wind turbine 36, and outside air is communicated in by the air control valve 35.It is described
One end of vapor communication pipe 31 is communicated in the steam copper type bell 2, and the other end of the vapor communication pipe 31 passes through the steaming
Steam control valve 34 is communicated in the gas mixing tube 32 close to one end of the air control valve 35.In turn, it can be steamed by adjusting
The size of steam control valve 34 and air control valve 35 and the mixed proportion for controlling air and water vapour in gas mixing tube 32, in turn
The lower part that the mixed air with water vapour is blown into grate 11 in combustion furnace 1 by the first wind turbine 36, to carry
The mixed gas of water vapour can cool down to aflame biomass fuel, prevent the coking of biomass fuel.
In an embodiment of the present invention, water inlet pipe 21, overflow pipe 22, ball-cock assembly 23 and steam is still further comprised to overflow
Mouth 24.Wherein, water inlet pipe 21 and overflow pipe 22 are communicated in steam copper type bell 2, and the effect of water inlet pipe 21 is to steam copper
Water filling in type bell 2, and the effect of overflow pipe 22 is to exclude water extra in steam copper type bell 2, ball-cock assembly 23 is installed
At the water inlet pipe 21 in steam copper type bell 2, with opening according to the water level control water inlet pipe 21 in steam copper type bell 2
It closes.Steam overfall 24 is opened in the top of steam copper type bell 2, to discharge the water vapour in steam copper type bell 2, prevents
The raising of air pressure in steam copper type bell 2.
In the more optimized scheme of the embodiment of the present invention, the biomass combustion machine further includes feed bin 51, wind stopping device 52,
Two wind turbines 53 and feed pipe 54.Wherein, the feed bin 51 is for storing biomass fuel temporarily.The wind stopping device 52 is located at described
The bottom of feed bin 51, and it is connected to by the feed pipe 54 top of biomass fuel rest area in the combustion furnace 1.It is described
The outlet side of second wind turbine 53 is connected to the feed pipe 54 close to one end of the wind stopping device 52, second wind turbine 53 into
Gas end is communicated in outside air.The control device can further be electrically connected to wind stopping device 52 and the second wind turbine 53, to control
State the blanking of biomass fuel, and by controlling the second wind turbine 53 by feed pipe 54 into combustion furnace 1 biomass fuel
It blows the top of rest area.
In addition, the biomass combustion machine of the embodiment of the present invention further includes whirlwind grid 12, the whirlwind grid 12 is located at institute
The lower part of grate 11 in combustion furnace 1 is stated, the gas mixing conveying assembly is connected to the whirlwind grid 11.To carry water
The mixed gas of steam is to be delivered up to the biomass fuel on grate 11 to put from whirlwind grid 11 in the combustion furnace 1
Area is set, may make the mixed gas with water vapour can be evenly into the biomass fuel rest area in this way.
In addition, in order to make biomass fuel fully burn to obtain more thermal energy, it is described in the embodiment of the present invention
Biomass combustion machine further includes burner 13, and the burner 13 is installed on the side wall of the combustion furnace 1, and close to the steam
Pot type bell 2, the combustion furnace 1 is in the side-walls opening for installing the burner 13 so that the flame in the combustion furnace 1 is logical
The opening is crossed to enter the burner 13 and spray from the burner.
With the burner 13, the biomass combustion machine further includes third wind turbine 14 and burner communicating pipe 15.Its
In, the outlet side of the third wind turbine 14 is by being communicated in the burner 13, the third wind burner communicating pipe 15
The inlet end of machine 14 is connected to outside air.In this way, when by third wind turbine 14 to when 13 air blast of burner, can be 13 to burner
The flame divided plays the role of combustion-supporting.Meanwhile the control device can further be electrically connected to third wind turbine 14, to control third wind
Machine 14 is blown by the burner communicating pipe 15 to the burner 13 in turn.
In the embodiment of the present invention, the furnace wall 16 of the combustion furnace 1 is refractory insulating layer.In addition, the furnace wall of the combustion furnace 1
16 are additionally provided with fire door 17 (dotted line frame in such as Fig. 2), in order to topple over residue and cleaning burner hearth.
The embodiment of the present invention additionally provides a kind of combustion method of biomass fuel, using biomass combustion as introduced above
Machine, as shown in figure 3, this method includes：
Biomass fuel is placed on the grate in the combustion furnace by step 1；
Step 2 injects water into the steam copper type bell；
Step 3 lights the biomass fuel, and monitors the temperature of the biomass fuel rest area；
Step 4, when the temperature of the biomass fuel rest area be higher than predetermined threshold value when, by the water in steam copper type bell
It is delivered in the combustion furnace after steam and outside air mixing, is somebody's turn to do so that the temperature of the biomass fuel rest area is less than
Predetermined threshold value.
In above-mentioned steps, the execution sequence of step 1 and step 2 is commutative, i.e., can also first carry out step 2 and carry out step again
1。
The implementation procedure of above-mentioned steps 1 is that biomass fuel is first poured into feed bin 51, later by control device to closing wind
The control of device 52 so that biomass fuel enters combustion furnace 1 by feed pipe 54, and then falls into the biomass fuel on grate 11
Rest area.
Above-mentioned steps 3 and step 4 and then are synthetically controlled by the temperature of the real-time collecting temperature sensor of control device 4
The action of steam control valve 34, air control valve 35, the first wind turbine 36, the second wind turbine 53 and third wind turbine 14 processed so that be located at
Biomass fuel in combustion furnace 1 can fully burn and avoid coking.
It is to be further explained to the embodiment of the present invention below.
It is for use that biomass fuel is first put into feed bin 51.2 water filling of steam copper type bell to defined water level (is slightly below overflow
The height of overflow pipe 22).By control device, steam control valve 34 and air control valve 35 are adjusted to maximum opening.
Start wind stopping device 52 by control device, makes biomass fuel through feed pipe 54, enter in 1 cavity of combustion furnace
On grate 11.
Fire door 17 is opened, with the material point biomass-burning fuel that ignites, and closes fire door 17.
By control device start the acquisition to the signal of temperature sensor 4 and and to the first wind turbine 36, the second wind turbine 53,
Third wind turbine 14, feed bin 51 and wind stopping device, steam control valve 34 and air control valve 35 are controlled to adjust accordingly.It is burning
Biomass fuel rest area in stove 1 forms the first combustion zone, and the top of the first combustion zone in combustion furnace 1 forms the second combustion
Area's (feed pipe 54 be open nearby) is burnt, is exported in burner 13 and forms third combustion zone.
With the continuous progress of burning, the first combustion zone, the second combustion zone, third combustion zone temperature increase rapidly.It steams
Water evaporation speed in steam-boiler type bell 2 is accelerated, and in turn, is mixed with the air of a certain amount of vapor by the first wind turbine 36,
Enter the first combustion zone through combustion furnace communicating pipe 33, whirlwind grid 12, grate 11.When the temperature of the first combustion zone is less than default threshold
When value, 35 aperture of air control valve is increased by control device, reduces 34 aperture of steam control valve, while increasing by the first wind
The frequency of machine 36 so that the temperature rise of the first combustion zone.When the temperature of primary combustion zone is higher than predetermined threshold value, pass through control
35 aperture of air control valve is reduced, increases 34 aperture of steam control valve by device, while reducing the frequency of the first wind turbine 36, is made
The temperature for obtaining the first combustion zone declines.
It is by control device that the frequency of the second wind turbine 53 is appropriate when the vapor spill-out of steam overfall 24 is too big
Reduce, while the frequency of third wind turbine 14 suitably being increased, and then the heat for being sent to steam copper type bell 2 can be reduced, reduces
The generation of water vapour.Preferably, the predetermined threshold value is 900 DEG C.
In the embodiment of the present invention, 36 import of the first wind turbine be air and vapor mixed gas, the first combustion zone it is anti-
It should be as follows：
2C+O2=2CO
C+H2O=CO+H2
Biomass fuel region forms combustion gasification (pyrolysis) region, i.e. the first combustion zone, the first combustion above grate 11
Area is burnt for the purpose of biomass pyrolytic generates biological fuel gas, and burning is mainly to provide the condition of pyrolysis, and temperature is controlled at 900 DEG C
A certain range below, and then ensure that the temperature of the first combustion zone is less than the ash fusion point of used biological material, avoid ash content molten
Melt to form coking.First wind turbine can be the high pressure positive blower that power is 750 watts, by Frequency Converter Control, according to how much tune of fuel
Suitable air quantity is saved, vapor is all transported to primary combustion zone, can adjust the ratio of air and vapor according to actual needs
Example, such as the ratio of adjustment air and vapor are 10:1.
And water vapour is not contained for traditional combustion furnace (such as shown in Fig. 1), in the air that wind turbine is blown into, in grate
The chemical reaction that fuel bed on son occurs is as follows：
C+O2=CO2
2C+O2=2CO
So that traditional combustion furnace temperature is more than the fusing point of alkali metal oxide, alkali metal oxide is caused to melt, shape
At the sticky vitreum of molten, abbreviation coking.The composition of biomass fuel includes charcoal, organic volatile matter, water, metal oxidation
Object, wherein charcoal and organic volatile matter are aoxidized in combustion, generate carbon dioxide and water, and release thermal energy, remaining
Metal oxide is ash content.
The embodiment of the present invention is additionally arranged temperature sensor and control device, and then can ensure that the temperature control of the first combustion zone
In 900 DEG C or less a certain ranges, such as in the range of 800 DEG C -850 DEG C, is not melted, kept away with the ash content ensured in biomass fuel
Exempt from coking.
In the embodiment of the present invention, in the second combustion zone, the substance of burning is CO and H2, the reaction of the second combustion zone is as follows：
2CO+O2=2CO2
2H2+O2=2H2O
And the mainly CO that traditional combustion stove burns in the second combustion zone：
2CO+O2=2CO2
The second combustion zone temperature is less than 900 DEG C in the embodiment of the present invention, and there are two main causes：
One：2H2+O2=2H2O
Secondly：The continuous evaporation endothermic of water in steam copper type bell 2 plays reduction and stablizes the second combustion zone temperature
Function.It is since the addition reaction of vapor is got to have the addition of hydrogen in second combustion zone, and the second combustion zone is combustion furnace
A part for interior continuous-stable burning, the second wind turbine air inlet mainly prevent fuel from burning in feeding warehouse.
In the embodiment of the present invention, steam copper type bell 2 generates steam, is used for the first combustion zone, temperature is substantially close to water
Boiling point；And bell is unlikely to deform and cracks.And traditional bell is mostly refractory material, poor thermal conductivity, calorific intensity is poor, and temperature is basic
At 1200 DEG C or so, it is easily damaged.
In the embodiment of the present invention, due to the fuel storage area noncoking in the first combustion zone on grate, First air (
One wind turbine blows) be capable of consistent pass through fuel bed, keep stove burning highly stable.
For a better understanding of the present invention, the present invention also provides a kind of implementations of the combustion method of biomass fuel for example
Under：
As the heating equipment of external-heat (dry distillation type) biomass carbonizing furnace, 400 to the 650 suitable temperature of degree are heated to,
Ensure the pyrolytic reaction of biomass within the scope of stable temperature.
About 200 kgs/hr of the dosage of biomass fuel per hour.The ratio of water vapour and outside air is 1:6.First
The specific frequency of wind turbine, the second wind turbine and third wind turbine is respectively 20Hz, 30Hz and 35Hz, primary combustion zone, intermediate zone
The actual temp of combustion zone is respectively 800 ± 50 DEG C, 950 ± 50 DEG C and 1050 ± 50 DEG C three times, and the heat finally generated is about
For 600,000 kilocalories/hour, and do not find coking phenomenon.
The advantages of combustion method of the biomass combustion machine of the embodiment of the present invention and biomass fuel, is：
Provide novel steam copper type bell, the steam copper type bell due to water continuous supply and evaporation, even if warm
It spends highest bottom and also obtains dynamic equilibrium at 100 DEG C or so, the high temperature that lower part flame can be also stood with common carbon steel is made
With compared with traditional fire resisting bell, making simple, using reliable, will not burst apart, collapse, also, the steam generated is just
Temperature for the first combustion zone is adjusted；The measurement and control of temperature of first combustion zone and adjusting, it is ensured that when biomass fuel combustion
The temperature of one combustion zone is less than the ash fusion point of fuel, therefore, will not cause the softening and melting of burning ashes, so, Bu Huijie
It is burnt；Due to will not coking, so the air feed of the first combustion zone remains unimpeded, combustor burning can very steady, effect
It is very good, and remove ashes also and become very easy；Due to the introducing of vapor and the implementation of temperature control measure so that grate
Failure rate reduces, and the service life greatly improves, also, the service life of furnace wall refractory insulating layer can also greatly improve；It is opened by control device
Move the acquisition to temperature sensor signal and to the first wind turbine, the second wind turbine, third wind turbine, wind stopping device, air control valve, steam
Regulating valve is controlled to adjust accordingly, can reach ideal combustion efficiency；Due to solving coking problem so that the present invention
Embodiment is suitable for all biomass fuels, solves traditional combustion machine and only adapts to that ash content is low, and high wooden of ash fusion point
The problem of biomass fuel.The present invention, which has herbaceous biomass fuel, well adapts to ability, is biomass clean fuel
Application opens wide space.The embodiment of the present invention, burning subregion is reasonable, combustion process clean environment firendly, equipment installation
Debugging is simple, and process is simple and reliable, and manufacturing cost is low.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of protection of the invention god.
Claims (10)
1. a kind of biomass combustion machine, which is characterized in that including：
Combustion furnace is equipped with grate in the combustion furnace, and biomass fuel, which is positioned on the grate, to burn；
Steam copper type bell, the steam copper type bell are placed on the combustion furnace, and it is interior be filled with water, the biomass fuel fire
Water vapour is generated when burning；
Gas mixing conveying assembly, the gas mixing conveying assembly include the first wind turbine, and the gas mixing conveying assembly connects
The lower part of grate in the logical steam copper type bell, outside air and combustion furnace, will be steamed under the action of first wind turbine
It is delivered in the combustion furnace after water vapour and outside air mixing in steam-boiler type bell；
Temperature sensor, the temperature sensor are located at the biomass fuel rest area on the grate；
Control device, the control device is electrically connected to the temperature sensor and first wind turbine, with according to the temperature
The temperature that sensor is acquired controls the wind-force of the first wind turbine conveying and controls the gas mixing conveying assembly to water
The mixed proportion of steam and outside air.
2. biomass combustion machine according to claim 1, it is characterised in that：
The gas mixing conveying assembly includes vapor communication pipe, gas mixing tube, combustion furnace communicating pipe, steam control valve, sky
Gas regulating valve and the first wind turbine；Wherein,
First wind turbine outlet side is connected to the bottom of grate in the combustion furnace by the combustion furnace communicating pipe；
The gas mixing tube is communicated between the inlet end and air control valve of first wind turbine, and passes through the air tune
Section valve is communicated in outside air；
One end of the vapor communication pipe is communicated in the steam copper type bell, and the other end of the vapor communication pipe is described in
Steam control valve is communicated in the gas mixing tube close to one end of the air control valve.
3. biomass combustion machine according to claim 1, it is characterised in that：
The biomass combustion machine further includes feed bin, wind stopping device, the second wind turbine and feed pipe；Wherein,
The feed bin is for storing biomass fuel temporarily；
The wind stopping device is located at the bottom of the feed bin, and is connected to biomass fuel in the combustion furnace by the feed pipe
The top of rest area；
The outlet side of second wind turbine is connected to the feed pipe close to one end of the wind stopping device, second wind turbine into
Gas end is communicated in outside air.
4. biomass combustion machine according to claim 1, which is characterized in that the biomass combustion machine further includes：
Whirlwind grid, the whirlwind grid are located at the lower part of grate in the combustion furnace, the gas mixing conveying assembly connection
To the whirlwind grid.
5. biomass combustion machine according to claim 1, which is characterized in that the biomass combustion machine further includes：
Burner, the burner are installed on the side wall of the combustion furnace, and close to the steam copper type bell, the combustion furnace
In the side-walls opening for installing the burner so that the flame in the combustion furnace enters the burner by the opening
And it is sprayed from the burner.
6. biomass combustion machine according to claim 5, it is characterised in that：
The biomass combustion machine further includes third wind turbine and burner communicating pipe；Wherein,
The outlet side of the third wind turbine by being communicated in the burner burner communicating pipe, the third wind turbine into
Gas end is connected to outside air.
7. biomass combustion machine according to claim 1, it is characterised in that：
The furnace wall of combustion furnace is refractory insulating layer.
8. biomass combustion machine according to claim 1, it is characterised in that：
The furnace wall of the combustion furnace is equipped with fire door.
9. a kind of combustion method of biomass fuel, using such as claim 1 to 8 any one of them biomass combustion machine, institute
The method of stating includes：
Biomass fuel is placed on the grate in the combustion furnace；
It injects water into the steam copper type bell；
The biomass fuel is lighted, and monitors the temperature of the biomass fuel rest area；
When the temperature of the biomass fuel rest area be higher than predetermined threshold value when, by steam copper type bell water vapour and the external world
It is delivered in the combustion furnace after air mixing, so that the temperature of the biomass fuel rest area is less than the predetermined threshold value.
10. the combustion method of biomass fuel according to claim 9, it is characterised in that：The predetermined threshold value is 900
℃。
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| CN110006031A (en) * | 2019-04-09 | 2019-07-12 | 山东正信德环保科技发展有限公司 | Biomass combustion machine |
| CN113864763B (en) * | 2021-09-17 | 2024-02-06 | 浙江特富炜业热能设备有限公司 | Energy-saving biomass fuel boiler |
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| WO2008030566A2 (en) * | 2006-09-07 | 2008-03-13 | Leverty Patrick A | Pellet burning heating assembly |
| CN102433160B (en) * | 2011-08-30 | 2013-10-02 | 张建超 | Control method for biomass gasification equipment |
| CN105402709A (en) * | 2015-11-30 | 2016-03-16 | 广东慧能新源科技有限公司 | Integrated multifunctional chimney-free low-carbon gas boiler |
| CN105650618A (en) * | 2016-01-28 | 2016-06-08 | 孟氏锅炉（北京）有限公司 | Water gas production and combustion integrated combustion method and equipment |
| CN205424897U (en) * | 2016-03-28 | 2016-08-03 | 遵义朝宇锅炉有限公司 | Biomass burning machine |
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